Rolling-mill.



L. KUNDA;

BoLLING MILL. APPLIOATIOI FILED KLB. 12, 1010. l

Patented Dec-.6,1910

ca.. wAsmNnwN, D. c.

LOUIS KUNDA, OF SOUTH OSHKOSH, WISCONSIN.

ROLLING-MILL.

Specification of Letters atent.

Patented Dec. 6, 1910.

Application filed March 12, 1910. Serial No. 548,829.

T o all who-m it 'may concern.'

Be it known that I, LOUIS KUNDA, residing in South Oshkosh, in thecounty of Tinnebago and State of Wisconsin, have invented new and usefulImprovements in Rolling-Mills, of which the following is a description,reference being had to the accompanying drawings, which are a part ofthis specification.

This invention has for its object to provide for withdrawing the airfrom within the casing of a roller mill so as to prevent thecondensation of moisture on the walls thereof and thus obviate theformation of cakes or crusts which are incident thereto and which impairthe value of the product.

In rolling mills a condition of warmth and moisture prevails, due to thecondition of the grain admitted thereto and due to the action of therolls thereon, and this results in the condensation of moisture upon thewalls of the casing with which the flour combines to form a paste thatwill eventually fall as a cake or crust and will be found as lumps inthe flour.

The present invention provides for causing a current of air through thecasing of the rolling .mill which will thereby withdraw the warm moistair and replace it with dry cool air which will prevent theobjectionable condensation.

A further object of the invention is to perfect the construction of sucha ventilating device for a rolling mill.

With the above and other objects in view the invention consists in therolling mill herein claimed, and all equivalents.

Referring to the accompanying drawings in which like characters ofreference indicate the same parts in the dierent views: Figure 1 is asectional elevation of a pair of rolling mills constructed in accordancewith this invention; Fig. 2 is a sectional view of one of the rollingmills on a plane at right angles to the sectional plane of Fig. 1,showing the ventilator head in elevation; Fig. 3 is a similar viewshowing the ventilator head in section; Fig. 4 is a transverse sectionalview of the ventilator head on the plane of line 4.-4 of Fig. 3; Fig. 5is an enlarged view of a fragment of the fabric with which theventilator head is covered; Fig. 6 is a detail view of the blower forconnection with the ventilators; and, Fig. 7 is a perspective view of aportion of one of the zigzag wire frames.

In these drawings 10 indicates the casings of rolling mills, eachcontaining two sets of rollers 11 in the usual manner.

space intervening between the two sets of rollers is a transversepartition-like ventilator head 12 which extends from one side of therolling mill casing to the other and from the bottom thereof to near thelevel of the rollers. This ventilator head is preferably constructed ofsheet metal with opposite faces spaced slightly apart to alford apassageway between them which is entirely inclosed except for the inletslots 13 at the upper end of said faces extending nearly across .theentire width thereof and the outlet at the contracted lower end 14 whereit con-v nects with a pipe 15 common to the ventilator heads of all ofthe rolling mills. The pipe 15 connects with a fan blower 16 at botheyes thereof by having branches 17 extending up on both sides of theblower casing, as shown in Fig. 6.

On the opposite sides of the ventilator head 12 are secured wire frames18 which, as shown in Fig. 7, are formed of vertical rods alternatelyarranged in parallel planes and connected by strips at their upper andlower ends. These frames may be soldered or otherwise secured to theopposite faces of the ventilator head and are covered with a hairyfabric 19, such as a canton flannel or the like which is abundantlyprovided with shorthairs or projecting bers on the side which isoutermost. The entire frame 18 is provided with this covering as well asthe upper end of the ventilator head, for the purpose thereof is toprevent the air carrying the flour with it into the ventilator. The longfree bers on the outside of the covering cloth 19 serve to shed theflour and cause it to fall without reaching the mesh of the fabric,while the air is free to pass therethrough under the suction created bythe fan blower and in order that the full value of the extended coveringarea may be availed of, the cloth is mounted on the wire frames 19 insuch a manner that the lsaid frames are outside thereof, Fig. 7, theouter folds of the cloth being bound to the vertical rods yof the frameby being stitched thereto as shown at 20 in Fig. 2. The zigzag frame 18therefore serves to produce a maximum area of screen surface to theventilator head within the limited space occupied by the device withinthe casing of the rolling mill. An inverted Positioned vbeneath therollers and directly below the V-shaped guard 2l extends across the topof the ventilator head to prevent flour lodging on top thereof.

By means of this invention the casing of each rolling mill is constantlysubjected to a change of the air contained therein, the warm moist airbeing drawn through the covering for the ventilator head Where it isscreened from the flour and being ejected through the blower, and cool,dry air being drawn into the rolling mill casing to take its place andthereby maintaining a condition within the rolling mill casing whichwill not permit of the condensation of moisture and the attendingobjectionable features thereof.

That I claim as new and desire to secure by Letters Patent is` l. In aventilator for rolling mill casings, a ventilator head having oppositewalls spaced a short distance apart with a passage way between them,there being openings in said opposite walls, zigzag frames secured tothe ventilator head, a fabric stretched upon said zigzag frames toinclose the openings and to present a maximum Surface to the interior ofthe rolling mill casing, and

means for withdrawing air from the ventilator head.

2. In a ventilator for rolling mill casings, a ventilator headcomprising opposite walls spaced a short distance apart to occupy aminimum space within the roller mill casing, zigzag frames mounted onthe opposite faces of the ventilator head, a covering cloth for thezigzag frames having free fibers on the outside surface thereof to shedthe flour from the meshes of the cloth while permitting the moist warmair ofthe rolling mill casing to pass therethrough, there being openingsat the upper ends of the opposite faces of the ventilator head toreceive the air from the cloth covering, a guard on top of theventilator head to shed the flour therefrom, a pipe connected with theventilator head, and a blower having its eyes connected with the pipe.

In testimony whereof, I aiix my signature, in presenceof two witnesses.

LOUIS KU NDA. Witnesses:

Jon KRAUTKRAMER, PETER KRAUTKRAMER.

